High-pressure plasmas as spectroscopic emission sources

Greenfield, S.; Jones, I. Ll.; Berry, C. T.

doi:10.1039/an9648900713

Cited by 399 publications

(105 citation statements)

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“…The inductively coupled plasma optical emission spectrometry [154] is an analytical method for the detection of chemical elements with great precision. The resolution depends on the respective elements and sample conditions and reaches limits of several µg·l -1 .…”

Section: Inductively Coupled Plasma Optical Emission Spectrometry (Icmentioning

confidence: 99%

“…To quantify the composition of materials, inductively coupled plasma based spectrometric methods [154,160] such as mass spectrometry (ICP-MS) or optical emission spectrometry (ICP-OES) are very powerful tools and are widely used for the quality control in different industrial sectors. Traditionally, ICP methods are optimized for use the detection of metal ions in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Surface Patterning with Colloidal Monolayers

Vogel

2012

Springer Theses

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This thesis focuses on the controlled assembly of monodisperse polymer colloids into ordered two-dimensional arrangements. These assemblies, commonly referred to as colloidal monolayers, are subsequently used as masks for the generation of arrays of complex metal nanostructures on solid substrates.The motivation of the research presented here is twofold. First, monolayer crystallization methods were developed to simplify the assembly of colloids and to produce more complex arrangements of colloids in a precise way. Second, various approaches to colloidal lithography are designed with the aim to include novel features or functions to arrays of metal nanostructures.The air/water interface was exploited for the crystallization of colloidal monolayer architectures as it combines a two-dimensional confinement with a high lateral mobility of the colloids that is beneficial for the creation of high long range order. A direct assembly of colloids is presented that provides a cheap, fast and conceptually simple methodology for the preparation of ordered colloidal monolayers. The produced two-dimensional crystals can be transformed into nonclose-packed architectures by a plasma-induced size reduction step, thus providing valuable masks for more sophisticated lithographic processes. Finally, the controlled co-assembly of binary colloidal crystals with defined stoichiometries on a Langmuir trough is introduced and characterized with respect to accessible configurations and size ratios.Several approaches to lithography are presented that aim at introducing different features to colloidal lithography. First, using metal-complex containing latex particles, the synthesis of which is described as well, symmetric arrays of metal nanoparticles can be created by controlled combustion of the organic material of the colloids. The process does not feature an inherent limit in nanoparticle size and is able to produce complex materials as will be demonstrated for FePt alloy particles. Precise control over both size and spacing of the particle array is presented.Second, two lithographic processes are introduced to create sophisticated nanoparticle dimer units consisting of two crescent shaped nanostructures in close proximity; essentially by using a single colloid as mask to generate two structures simultaneously. Strong coupling processes of the parental plasmon resonances of the two objects are observed that are accompanied by high near-field enhancements. A plasmon hybridization model is elaborated to explain all polarization dependent shifts of the resonance positions. Last, a technique to produce laterally patterned, ultra-flat substrates without surface topographies by embedding gold nanoparticles in a silicon dioxide matrix is applied to construct robust and re-usable sensing architectures and to introduce an approach for the nanoscale patterning of solid supported lipid bilayer membranes.

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Section: Inductively Coupled Plasma Optical Emission Spectrometry (Icmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Patterning with Colloidal Monolayers

Vogel

2012

Springer Theses

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“…On the subject of Analytical Chemistry, several outstanding contributions, such as, e.g., ion chromatography, flow injection analysis and electrothermal atomization (Massmann furnace) in atomic absorption spectrometry, were proposed. In 1964, stable inductively-coupled argon plasmas were obtained 23,24 and this proved to be essential in relation to atomic emission and mass spectrometry. A noteworthy growth in the number of data produced was noted, requiring more and more complex data treatment; this was the driving force towards the development of chemometrics as applied to Analytical Chemistry.…”

Section: The Golden Age: Renaissance After Warmentioning

confidence: 99%

The development of Analytical Chemistry in Brazil: retrospective and expectations

Zagatto

Sá

2003

J. Braz. Chem. Soc.

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O desenvolvimento da Química Analítica no Brasil ao longo do último século é avaliado criticamente em relação ao avanço científico internacional. Tendências para o próximo século são discutidas, especialmente no que tange à expressiva mudança de paradigma atualmente observada.The development of Analytical Chemistry in Brazil in the last century is critically evaluated in relation to international achievements. Tendencies for the next century are foreseen, especially in relation to the presently observed shifts in paradigm.

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“…[46] Additionally, it has been shown for inorganic particles that a high degree of stability is of crucial importance for reliable ICP-OES characterization using slurry methods. [34] Two different surfactants, ionic SDS and nonionic Triton X100, were chosen. First, ICP measurements of all different dispersions were performed with varying amounts of surfactant.…”

Section: Surfactant Additionmentioning

confidence: 99%

“…To quantify the composition of materials, inductively coupled plasma (ICP) based spectrometric methods [33,34] such as mass spectrometry (ICP-MS) or optical emission spectrometry (ICP-OES) are very powerful tools and are widely used for the quality control in different industrial sectors, ranging from metal and steel engineering or noble metal recycling to food control and environmental analysis, as the determination and quantification of (toxic) metal ions in drinking water. Traditionally, ICP methods are optimized for use of the detection of metal ions in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Accurate Elemental Analysis of Metal‐Containing Polymer Latexes Using ICP‐Optical Emission Spectrometry

Vogel

Hauser

Schuller

et al. 2010

Macro Chemistry & Physics

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The use of ICP‐OES to determine the metal content of metal‐complex‐containing colloidal dispersions is explored. Colloidal dispersions containing a defined amount of metal complex were produced by miniemulsion polymerization. It was found that simple ICP‐OES measurements yielded apparent metal concentrations significantly below the expected value. To examine the behavior of the colloidal dispersions in the ICP spectrometer, a systematic study on measurement conditions was performed. It was found that the addition of a surfactant to both colloidal dispersions and standards led to measured metal contents close to the theoretical value. Most reliable results were obtained using SDS in concentrations above the cmc.magnified image

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High-pressure plasmas as spectroscopic emission sources

Cited by 399 publications

References 0 publications

Surface Patterning with Colloidal Monolayers

Surface Patterning with Colloidal Monolayers

The development of Analytical Chemistry in Brazil: retrospective and expectations

Accurate Elemental Analysis of Metal‐Containing Polymer Latexes Using ICP‐Optical Emission Spectrometry

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